Show category content picture As category picture

[Fwendly]

Hi
Can anyone tell me if there is a way to make Virtuemart2 take a thumbnail of any item i have in a certain category,
and show that on the front page as the category picture?

Would be nice if it is possible to have a random picture of a product on the front page out of a certain category.
then i don't have to worry about the category picture showing a product that i don't offer anymore.

maybe a module or a pluggin for this ?